Artificial silk



i for artificial threads, because they are incorporated within the body of the thread said substances not in the viscose, but they willbecorne dissolved Patented Mar. 21, V 1933 UNITED STATES PATENT. OFFICE, 1

JOHANN JOSEPH srocxI-Y, or marrow,

ANDERHARD WITTE, OF BERLIN-1310mm I FELDS, GERMANY, ASSIGNORS, .BY MESNE ASSIGNMENTS, T0 AMERICAN GLANZ- srorr CORPORATION, orxnw YORK, N. Y. v r

ARTIFICIAL SILK in Drawing. Application filed April 9, 1929, Serial No. 353,889, and in Germany October a, 1m.

It is known that productsof artificial silk, especially fibres and threads, have been rendered opaque or mat by incorporating certain organic substances 1n the spinning substance, and especially with viscose silk it According to the presentinvention for making products of viscose, for instance ar-' tificial viscose silk, opaque or mat, such substances are best suited whichare particular-- ly insoluble in water, and which will remain solid at ordinary temperatures, and will not be practically changed by the alkali of the viscose or by the acid of the spinning bath, being emulsifiable per se by suitable organic substances.

Such substances are, for example, waxes, for instance Japan wax, mineral wax, or paraffine, or ozokerite, and beeswax.

According to this invention these waxes are dissolved in suitable organic substances such as benzol, toluol, xylol or mixtures thereof, and the solution emulsified with the viscose.

This can be done by addingsuch' a solution of a wax to the viscose, for example in the mixer when dissolving thexanthates, or by adding them to the finished viscose in an efficient emulsifying machine.

ary precautions.

The process permits adding variable quantities of these normally solid or semi-solid waxes, to obtain various degrees of the mat effect of the products of the viscose, espe- The. said waxes are especially adaptable during the spinning process. In this way this invention is well emulsified;

The viscose is then filtered and spun under the customis distinguished, from the usual finishing process,

wherein the threads I are loaded with wax after they are made, 1

and then on theexterior of the thread only.

Emample 1 ,To kilograms'of normal viscose'in a mixer is added a solution. of 400 grams of and the mixture well in the. customary way; 7 I

Example 2 To 100 kilos of normalviscose is added a solution of 500 grams of ozokerite dissolved in 1500 grams of benzol, and the mixture the resultant viscose solution is then treatedin the customary way and spun.

Forv beeswax xylol is the preferred solv vent. The emulsion and spinning are as above described.

WVe claim As a solution for use in the manufacture In testimony that wejclaim the foregoing as our invention, we have signed our names hereto. l

'JOHANN JOSEPH STOCKLY.) ERl-IARD WITTE. g l

of dull lustre-filaments, threads, bands, and n the like, a filtered and deaerated mixture comprising:

' I 7 Percent Viscose 98."? Japan wax l s 0.4 Benzol -l 0.9 

